CN203422519U - Ultra-wide-angle 2.8 primary lens - Google Patents
Ultra-wide-angle 2.8 primary lens Download PDFInfo
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- CN203422519U CN203422519U CN201320498174.6U CN201320498174U CN203422519U CN 203422519 U CN203422519 U CN 203422519U CN 201320498174 U CN201320498174 U CN 201320498174U CN 203422519 U CN203422519 U CN 203422519U
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Abstract
The utility model relates to an ultra-wide-angle 2.8 primary lens. In an optical system of the lens, a front set A, a diaphragm C and a rear set B are arranged in an incident direction of light from left to right. The front set A includes a negative meniscus lens A-1, a negative meniscus lens A-2 and a double-convex lens A-3 in sequence, and has a focal length fA=-9.8mm. The rear set B includes a double-convex lens B-1 and a cementing unit formed by a double-convex lens B-2 and a positive meniscus lens B-3 which are in close connection, and has a focal length fB=5.67mm. The lens provided by the utility model has the advantages of ultra-wide angle, high resolution, large relative aperture and day/night confocal properties, and can be adapted to a 3-megapixel high-resolution CCD or CMOS camera. The lens is suitable to be used in small-sight-distance large-view-angle places, such as elevator cars and lobbies, being a mainstream product for micro monitoring camera systems.
Description
Technical field
The utility model relates to the imaging lens device of supervisory system, particularly a kind of 2.8 focuses bugeye lens.
Background technology
On market, early there are various tight shots, are applied in supervisory system.But its spectrophotometric data is low, although some can reach the requirement of high definition, can have many defects in high-resolution wide-angle in monitoring during little space, can not there is super wide-angle, high resolving power, object lens of large relative aperture, the advantage such as confocal day and night simultaneously.
Utility model content
In order to overcome the defect of existing tight shot, the technical problems to be solved in the utility model is to provide a kind of 2.8 and focuses bugeye lens, and this camera lens, when possessing the chromatic sensitivity of going out, guarantees the clear and super wide-angle of image in space among a small circle; Meanwhile, even the in the situation that of insufficient light or night, also can guarantee the high-quality of image, arrive mega pixel.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of 2.8 focus bugeye lens, in the optical system of described camera lens along light from left to right incident direction be respectively equipped with front group of A, diaphragm C and after organize B, described front group of A is provided with negative crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3, the focal distance f of described front group of A successively
a=-9.8mm; The gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and positive crescent moon lens B-3, the focal distance f of described rear group of B
b=5.67mm.
In further technical scheme, the airspace between described front group of A and rear group of B is 1.16mm.
In further technical scheme, the airspace between the negative crescent moon lens A-1 in described front group of A and negative crescent moon lens A-2 is 1.84mm, and the airspace between described negative crescent moon lens A-2 and biconvex lens A-3 is 0.79mm.
In further technical scheme, the biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1mm.
Compared with prior art, the utlity model has following beneficial effect: (1) adopts the retrofocus type structure of positive negative power separation, the focal distance f of front group of A
a=-9.8mm, the focal distance f of rear group of B
b=5.67mm, after two constituent element combinations, makes rear leading role's reach of camera lens, the rear cut-off distance l≤1.2f of camera lens.(2) two negative crescent moon lens of the front group of this camera lens A are all selected the glass (for example H-FK61 optical material) of high index of refraction, born very large focal power, make the oblique ray of wide-angle, after front group of A quick " convergence ", reduce with the slanted angle of optical axis, through after organize after B refraction, the angle of chief ray and optical axis reduces, make camera lens realize good aberration correction, and make the uniform-illumination of image planes.(3) after the diaphragm C of camera lens, place biconvex lens B-1, effectively utilize the aberration that it carrys out corrective lens, make the resolution of camera lens up to 3,000,000 pixels.(4) this camera lens has super wide-angle, high resolving power, object lens of large relative aperture, the advantage such as confocal day and night, and be generally used in elevator cage, hall etc. neglected apart from place with great visual angle, is the main product of miniature monitored video camera system.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the optical system schematic diagram of the utility model embodiment.
Fig. 2 is the physical construction schematic diagram of the utility model embodiment.
In figure: trim ring before 1-, 2-bears crescent moon lens A-1,3-AB spacer ring, 4-body tube, 5-bears crescent moon lens A-2,6-biconvex lens A-3,7-CD spacer ring, 8-biconvex lens B-1,9-DE spacer ring, 10-biconvex lens B-2, the positive crescent moon lens of 11-B-3; Group before A-, A-1-bears crescent moon lens, and A-2-bears crescent moon lens, A-3-biconvex lens, group after B-, B-1-biconvex lens, B-2-biconvex lens, the positive crescent moon lens of B-3-, C-diaphragm, D-image planes.
Embodiment
As shown in Figure 1, a kind of 2.8 focus bugeye lens, in the optical system of described camera lens along light from left to right incident direction be respectively equipped with front group of A, diaphragm C and after organize B, described front group of A is provided with negative crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3, the focal distance f of described front group of A successively
a=-9.8mm; The gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and positive crescent moon lens B-3, the focal distance f of described rear group of B
b=5.67mm.
In the present embodiment, the airspace between described front group of A and rear group of B is 1.16mm; Airspace between negative crescent moon lens A-1 in described front group of A and negative crescent moon lens A-2 is 1.84mm, and the airspace between described negative crescent moon lens A-2 and biconvex lens A-3 is 0.79mm; Biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1mm.
During optical design, in field angle, under the prerequisite of super wide-angle, to visible spectral regions, be that 480nm ~ 850nm carries out aberration correction and balance, make camera lens all have good sensitivity in visible spectral regions, realized day and night confocally, wide spectrum is confocal.This camera lens can not only illumination condition in the daytime under blur-free imaging, can also under the extremely low environment of illumination at night, adopt infrared light filling, arrive 1,000,000 picture elements clearly.
In the present embodiment, described negative crescent moon lens A-1 and negative crescent moon lens A-2 select the optical glass material (for example H-FK61 optical material) of high refraction, low dispersion, by designing and optimizing the various aberrations of having proofreaied and correct optical lens, make camera lens realize super wide-angle, high resolving power, object lens of large relative aperture, the advantage such as confocal day and night.
In the present embodiment, the optical system consisting of above-mentioned lens set has reached following optical index: (1) focal length: f '=2.8mm; (2) relative aperture F=1.8; (3) field angle: 2w >=114 ° (image space 2 η ' >=Ф 6mm); (4) resolution: can be adaptive with 3,000,000 pixel high-resolution CCD or cmos camera; (5) light path overall length ∑≤22.46mm, optics rear cut-off distance l ' >=6.05mm; (6) applicable spectral line scope: 480nm ~ 850nm.
As shown in Figure 2, physical construction of the present utility model comprises body tube 4, and front group of A and rear group of B are positioned in body tube 4, by spacer ring and trim ring, guarantees the logical light of its eyeglass and the air distance between eyeglass.Described body tube 4 front ends are provided with the front trim ring 1 that compresses negative crescent moon lens A-1, guarantee being mounted with property, the stability of whole eyeglasses.Between described negative crescent moon lens A-1 and negative crescent moon lens A-2, be provided with AB spacer ring 3, guarantee the two space length and optical axis assembling thereof; Described negative crescent moon lens A-2 left end edge carries out annular cutting with location AB spacer ring 3, guarantees the outward appearance of negative crescent moon lens A-1, makes it not have white line.Between described biconvex lens A-3 and biconvex lens B-1, be provided with CD spacer ring 7, guarantee the two space length and optical axis assembling thereof.Between described biconvex lens B-1 and biconvex lens B-2, be provided with DE spacer ring 9, guarantee the two space length and optical axis assembling thereof.
In the present embodiment, the plane that the spacer ring of assurance eyeglass airspace contacts with eyeglass will have accurate verticality to guarantee the accuracy of eyeglass assembling; During design body tube 4, endoporus internal diameter size is carried out to strict size Control, it is coordinated closely with eyeglass, reach the right alignment of eyeglass installation requirement and the consistance of lens light axis, and on body tube 4, have strict size and status requirement.
During Design of Mechanical Structure, both guaranteed camera lens concentricity, precision and axial location accurately, make again structural design compactness small and exquisite (overall dimensions Ф 18mm * 15.98mm), simultaneously in order to eliminate the parasitic light of camera lens, at CD spacer ring 7, done delustring line, DE spacer ring 9 is made to staged, thereby eliminated the stability of halation problem and assurance structure.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (4)
1. one kind 2.8 focuses bugeye lens, it is characterized in that: in the optical system of described camera lens along light from left to right incident direction be respectively equipped with front group of A, diaphragm C and after organize B, described front group of A is provided with negative crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3, the focal distance f of described front group of A successively
a=-9.8mm; The gummed group that described rear group of B is provided with successively biconvex lens B-1 and connected airtight by biconvex lens B-2 and positive crescent moon lens B-3, the focal distance f of described rear group of B
b=5.67mm.
2. according to claim 1 2.8 focus bugeye lens, it is characterized in that: the airspace between described front group of A and rear group of B is 1.16mm.
3. according to claim 1 and 2 2.8 focus bugeye lens, it is characterized in that: the airspace between the negative crescent moon lens A-1 in described front group of A and negative crescent moon lens A-2 is 1.84mm, and the airspace between described negative crescent moon lens A-2 and biconvex lens A-3 is 0.79mm.
4. according to claim 1 and 2 2.8 focus bugeye lens, it is characterized in that: the biconvex lens B-1 in described rear group of B and the airspace between gummed group are 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498174.6U CN203422519U (en) | 2013-08-15 | 2013-08-15 | Ultra-wide-angle 2.8 primary lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498174.6U CN203422519U (en) | 2013-08-15 | 2013-08-15 | Ultra-wide-angle 2.8 primary lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422519U true CN203422519U (en) | 2014-02-05 |
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ID=50021614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320498174.6U Expired - Fee Related CN203422519U (en) | 2013-08-15 | 2013-08-15 | Ultra-wide-angle 2.8 primary lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422519U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439782A (en) * | 2013-08-15 | 2013-12-11 | 福建福光数码科技有限公司 | Ultra-wide-angle lens with 2.8mm fixed focus |
| CN109471242A (en) * | 2018-12-25 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
-
2013
- 2013-08-15 CN CN201320498174.6U patent/CN203422519U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439782A (en) * | 2013-08-15 | 2013-12-11 | 福建福光数码科技有限公司 | Ultra-wide-angle lens with 2.8mm fixed focus |
| CN103439782B (en) * | 2013-08-15 | 2015-08-12 | 福建福光数码科技有限公司 | 2.8 focus bugeye lens |
| CN109471242A (en) * | 2018-12-25 | 2019-03-15 | 福建福光天瞳光学有限公司 | A kind of 3.9mm focal length Streaming Media intelligent back vision camera lens and its imaging method |
| CN109471242B (en) * | 2018-12-25 | 2024-03-05 | 福建福光天瞳光学有限公司 | 3.9mm focal length streaming media intelligent rearview mirror and imaging method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: FUJIAN FORECAM CO., LTD. Free format text: FORMER NAME: FUJIAN FORECAM DIGITAL TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee after: FUJIAN FORECAM CO., LTD. Address before: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee before: Fujian Forecam Optics Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20160815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |